PHX PHX Push Index X on Stack PHX
65816 only!
N V M X D I Z C
Operation: X-Ws, S-2 -> S . . . . . . . .
+----------------+-----------------------+---------+---------+----------+
| Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
+----------------+-----------------------+---------+---------+----------+
| Implied/Stack | PHX | $DA | 1 | 3/4 |
+----------------+-----------------------+---------+---------+----------+
For penalty cycles on the 65816, check the desired addressing mode.